Senior Backend Engineer (Kotlin/Java) — Remote

Zallpy Digital; United States; Remote; USD 120,000 - 180,000; Full time

Benefits offered by this job

Meal Allowance

Health Plan

Dental Plan

Wellhub

Zenklub Sessions

Life Insurance

Childcare Allowance

Baby Zallpy

Business Partner Support

Volunteer Communities

Educational Partnerships

Experiences & Development

Referral Program

Job summary

Zallpy Digital is a fully remote position seeking a senior backend engineer to develop and evolve Kotlin/Java tools for interface models, with a focus on transformation and validation, in a fully remote setup.

You will collaborate with cross-functional teams to design model-to-model and model-to-text transformations, and ensure robust JSON serialization with schema validation while adhering to best practices in CI and testing.

Qualifications

• Senior-level experience with Kotlin and Java.
• Experience with multi-module Gradle builds.
• Hands-on experience with model transformation (metamodels, schemas, domain models).
• Experience with schema-aware JSON serialization (JSON Schema, kotlinx.serialization, Jackson).
• Knowledge of Git, CI, and automated testing best practices.
• Advanced English for daily communication with an international client.

Responsibilities

• Develop and evolve backend tools in Kotlin and Java to import, transform, validate, and export interface models.
• Design model-to-model and model-to-text transformations between different interface formats.
• Implement JSON serialization and deserialization driven by schemas, with strong validation and versioning.
• Structure and maintain multi-module Gradle builds, keeping modules, dependencies, and releases organized.
• Write automated tests and keep the tooling reliable and well documented.
• Collaborate with the language and web teams so the models fit the editor and the API Studio platform.
• Take part in technical decisions, code reviews, and continuous improvements to architecture and quality.

Skills

Kotlin & Java

Gradle multi-module

Model transformation

JSON serialization

Git & CI

English proficiency

Tools

Gradle

JSON Schema

kotlinx.serialization

Jackson

Job description

Zallpy Digital is a fully remote position seeking a senior backend engineer to develop and evolve Kotlin/Java tools for interface models, with a focus on transformation and validation, in a fully remote setup.

You will collaborate with cross-functional teams to design model-to-model and model-to-text transformations, and ensure robust JSON serialization with schema validation while adhering to best practices in CI and testing.